"My people are reaching out to Robert Downey Jr. and to Mark Wahlberg. I know both of them and Mark is a tremendous human being," Michael says. "Hopefully they'll see her before she gets out and she'll get in this rehab and get off these prescription meds, and she'll get her life back."

Michael hopes that Downey -- whose own struggles with drugs and alcohol put the actor behind bars for nearly 16 months in the late '90s -- can help the young actress revive her stagnant acting career when she completes her 90-day rehabilitation program.

"Once she gets out, which will be Thursday or Friday, of course I'm going to fly back and I'll be there for her," Michael says.

But until she enters the program, Lindsay's 50-year-old father -- who spent two-and-a-half years behind bars in 2005 after being charged with a DUI and aggravated unlicensed operation of a motor vehicle -- is slamming the actress' current use of prescription pills (the actress has denied his claims that she has a drug problem).PHOTOS: See how Lindsay's face has changed

"She's only on two [medications] right now. Ambien is for sleeping, so I can understand that," Michael says. "But this Adderall stuff has got to be stopped. Seven out of 10 kids in college are on this stuff and it's no more than methamphetamine! It's speed."